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<b>DB_ENV-&gt;set_tx_timestamp</b>
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<tt>
<b><pre>
#include &lt;db.h&gt;
<p>
int
DB_ENV-&gt;set_tx_timestamp(DB_ENV *dbenv, time_t *timestamp);
<p>
int
DB_ENV-&gt;get_tx_timestamp(DB_ENV *dbenv, time_t *timestampp);
</pre></b>
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<b>Description: DB_ENV-&gt;set_tx_timestamp</b>
<p>Recover to the time specified by <b>timestamp</b> rather than to the
most current possible date.</p>
<p>Once a database environment has been upgraded to a new version of Berkeley DB
involving a log format change (see <a href="../ref/upgrade/process.html">Upgrading Berkeley DB installations</a>), it is no longer possible to recover
to a specific time before that upgrade.</p>
<p>The DB_ENV-&gt;set_tx_timestamp method configures operations performed using the specified
<a href="../api_c/env_class.html">DB_ENV</a> handle, not all operations performed on the underlying
database environment.</p>
<p>The DB_ENV-&gt;set_tx_timestamp method may not be called after the <a href="../api_c/env_open.html">DB_ENV-&gt;open</a> method is
called.
</p>
<p>The DB_ENV-&gt;set_tx_timestamp method
returns a non-zero error value on failure
and 0 on success.
</p>
<b>Parameters</b> <br>
 <b>timestamp</b><ul compact><li>The <b>timestamp</b> parameter references the memory location where the
recovery timestamp is located.
<p>The <b>timestamp</b> parameter should be the number of seconds since 0
hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal
Time; that is, the Epoch.</p></ul>
<br>
<br><b>Errors</b>
<p>The DB_ENV-&gt;set_tx_timestamp method
may fail and return one of the following non-zero errors:</p>
<br>
<b>EINVAL</b><ul compact><li>If it is not possible to recover to the specified time using the log files
currently present in the environment; or if an
invalid flag value or parameter was specified.</ul>
<br>
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<b>Description: DB_ENV-&gt;get_tx_timestamp</b>
<p>The DB_ENV-&gt;get_tx_timestamp method returns the recovery timestamp.</p>
<p>The DB_ENV-&gt;get_tx_timestamp method may be called at any time during the life of the
application.</p>
<p>The DB_ENV-&gt;get_tx_timestamp method
returns a non-zero error value on failure
and 0 on success.
</p>
<b>Parameters</b> <br>
 <b>timestampp</b><ul compact><li>The DB_ENV-&gt;get_tx_timestamp method returns  the
recovery timestamp in <b>timestampp</b>.</ul>
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<br><b>Class</b>
<a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/txn_class.html">DB_TXN</a>
<br><b>See Also</b>
<a href="../api_c/txn_list.html">Transaction Subsystem and Related Methods</a>
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